Ipomoea batatas (L.) Lam. · Sweet potato
Yencho George Craig|Raleigh, NC, US / Pecota Kenneth|Raleigh, NC, US / Hancock Charles Newell|Bear Creek, NC, US
Kyuikukan 1 gou
ActiveIpomoea batatas (L.) Lam. Sweet potato · Vegetables · bred by Yasuhiro Takahata^^^Masaru Tanaka^^^Hiroki Nakayama^^^Tetsufumi Sakai^^^MASARU YOSHINAGA^^^Yoshinori Nakazawa^^^Toru Kumagai^^^Yumi Kai^^^Kenji Katayama^^^Koji Ishiguro^^^Osamu Yamakawa^^^Yasuyuki Murakami^^^Kazunari Iwaki^^^Takuro Ishihara^^^Masahiro Yam
also searched as: кюикукан 1 гоу
Variety description
10 August 2026
The variety «Kyuikukan 1 gou» (also known as «Kyuikukan 1» or «Suntory Black Tone») was bred as an ornamental plant. It is characterized by trailing stems and heart-shaped leaves of a dark olive color with a pronounced dark purple, almost black, hue.
The plant is not intended for industrial tuber production, therefore standard agricultural performance indicators for it have not been determined. The variety serves as a parental form in the breeding of other ornamental cultivars and is also studied in scientific publications for its leaf content of polyphenols and antioxidants.
Sources2
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Countries of admission
1 jurisdiction
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
Variety registered as early as 2 jurisdictions, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.
Variety in registries Regions of admission, rights holders, and status of plant breeders' rights
Parties
- Breeder
- Yasuhiro Takahata^^^Masaru Tanaka^^^Hiroki Nakayama^^^Tetsufumi Sakai^^^MASARU YOSHINAGA^^^Yoshinori Nakazawa^^^Toru Kumagai^^^Yumi Kai^^^Kenji Katayama^^^Koji Ishiguro^^^Osamu Yamakawa^^^Yasuyuki Murakami^^^Kazunari Iwaki^^^Takuro Ishihara^^^Masahiro Yam 2 Developed the variety
- Applicant
- Taizo Chinju 70 Submitted the application to the register
- Rights holder
- Taizo Chinju 70 Holds the rights to the variety
Plant breeders' rights
The right is granted for a limited term: propagation of the variety requires a license from the rights holder.
Canada
№ 07-5827
Withdrawn
- Application filed 30 March 2007
- Registered —
- Entry closed 14 March 2008
More 2 records protections in other jurisdictions are shown on the map above.
Records are sourced from official registry publications. Data sources and legal status
Found an error in the record?
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This is a directory, not an official registry: data is based on public disclosures and may have changed. More about sources
Same species
Other varieties: Sweet potato
Ipomoea batatas (L.) Lam. · Sweet potato
Yencho George Craig|Raleigh, NC, US / Pecota Kenneth|Raleigh, NC, US / Hancock Charles Newell|Bear Creek, NC, US
Ipomoea batatas (L.) Lam. · Sweet potato
Yencho George Craig|Raleigh, NC, US / Pecota Kenneth|Raleigh, NC, US
KSP1
ActiveIpomoea batatas (L.) Lam. · Sweet potato
LEE BYUNG CHANCHO EUN-GI
RO
1 record
Kyuikukan 1
ActiveIpomoea batatas (L.) Lam. · Sweet potato
Yasuhiro Takahata^^^Masaru Tanaka^^^Hiroki Nakayama^^^Tetsufumi Sakai^^^MASARU YOSHINAGA^^^Yoshinori Nakazawa^^^Toru Kumagai^^^Yumi Kai^^^Kenji Katayama^^^Koji Ishiguro^^^Osamu Yamakawa^^^Yasuyuki Murakami^^^Kazunari Iwaki^^^Takuro Ishihara^^^Masahiro Yam
Kyuikukan 3
ActiveIpomoea batatas (L.) Lam. · Sweet potato
Yasuhiro Takahata^^^Tetsufumi Sakai^^^Masaru Tanaka^^^MASARU YOSHINAGA^^^Hiroki Nakayama^^^Yoshinori Nakazawa^^^Toru Kumagai^^^Yumi Kai^^^Kenji Katayama^^^Yasuyuki Murakami^^^Kazunari Iwaki
Nearby in the species list KORETTA, KPOZ0003, KPOZ0004, KPOZ0005, KPOZ0006, KPOZ0007, KSC1, KSH1, KSP1, Kyuikukan 1, Kyuikukan 3, Kyuikukan 4, Kyuikukan 6, LA 04 175, LA 06-52, LA 13 81, Lovrenc, Lučka, Makatea, Manihi